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Revenues - Contract Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 9,302	$ 12,913
Change, Accounts receivable, net	$ (3,611)
Change, Accounts receivable, net, percent	(28.00%)
Deferred revenue	$ 49,983	32,620
Change, Deferred revenue	$ 17,363
Change, Deferred revenue, percent	53.00%
Contract assets	$ 16,358	$ 13,243
Change, Contract assets	$ 3,115
Change, Contract assets, percent	24.00%

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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